Ответ:
1. - (21+26)= -47
2. - 45+53=8
3. 25+55=80
4. -(77-17)=-60
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2.-45+53=8
Ответ:
1. - (21+26)= -47
2. - 45+53=8
3. 25+55=80
4. -(77-17)=-60